#!/usr/bin/env bash
set -euo pipefail
# Purpose: Watch docker logs of a host container and react to an error pattern.
# Notes:
# - This runs *inside* a container with /var/run/docker.sock mounted.
# - Requires docker CLI inside this container.

# ---- Config via env (with sane defaults) ----
CONTAINER_NAME="${CONTAINER_NAME:-paperless-ai}"
OLLAMA_HOST="${OLLAMA_HOST:-192.168.222.12}"
OLLAMA_PORT="${OLLAMA_PORT:-11434}"
ERROR_PATTERN="${ERROR_PATTERN:-Error: \\[ERROR\\] Document analysis failed: connect EHOSTUNREACH ${OLLAMA_HOST}:${OLLAMA_PORT}}"

DOCKER_CLI="${DOCKER_CLI:-docker}"      # docker CLI binary name
WOL_CMD="${WOL_CMD:-wakeonlan}"         # or "etherwake -i eth0 $WOL_MAC"
NC_CMD="${NC_CMD:-nc}"                  # netcat
WOL_MAC="${WOL_MAC:-}"                  # optional: MAC to WOL
SINCE="${SINCE:-0s}"                    # logs window (e.g., 5m)

log() { printf '[%(%F %T)T] %s\n' -1 "$*"; }

# Basic pre-flight: show which container is watched
log "Watching logs for container='${CONTAINER_NAME}' since='${SINCE}'"
log "Looking for pattern: ${ERROR_PATTERN}"

# Stream logs and parse
"${DOCKER_CLI}" logs -f --since "${SINCE}" "${CONTAINER_NAME}" 2>&1 | \
while IFS= read -r line; do
  # echo "$line"   # uncomment for debugging
  if echo "$line" | grep -qE "${ERROR_PATTERN}"; then
    log "Detected EHOSTUNREACH for Ollama (${OLLAMA_HOST}:${OLLAMA_PORT})."
    # --- remediation examples (optional) ---
    # if [[ -n "$WOL_MAC" ]]; then
    #   log "Sending WOL to ${WOL_MAC}"
    #   $WOL_CMD "$WOL_MAC" || true
    # fi
    # until $NC_CMD -z "$OLLAMA_HOST" "$OLLAMA_PORT"; do
    #   log "Waiting for Ollama to be reachable..."
    #   sleep 2
    # done
    # log "Ollama reachable again."
  fi
done